.father {
  width: 100px;
  height: 100px;
  background-color: pink;
  a {
    font-weight: 600;
    color: red;
    text-decoration: none;
    &:hover {
      color: burlywood;
    }
    &::before {
      content: "SS";
      display: block;
      float: left;
      width: 20px;
      height: 20px;
      background-color: black;
    }
  }
  .child {
    height: 50px;
    background-color: aqua;
  }
}